using System;

using System.Collections.Generic;

using Conductor.Domain.Interfaces;

using Conductor.Domain.Models;

using Microsoft.Scripting;

namespace Conductor.Domain.Scripting

{

public class ScriptEngineHost : IScriptEngineHost

{

private readonly IScriptEngineFactory _engineFactory;

public ScriptEngineHost(IScriptEngineFactory engineFactory)

{

_engineFactory = engineFactory;

}

public void Execute(Resource resource, IDictionary<string, object> inputs)

{

var engine = _engineFactory.GetEngine(resource.ContentType);

var source = engine.CreateScriptSourceFromString(resource.Content, SourceCodeKind.Statements);

var scope = engine.CreateScope(inputs);

source.Execute(scope);

SanitizeScope(inputs);

}

public dynamic EvaluateExpression(string expression, IDictionary<string, object> inputs)

{

var engine = _engineFactory.GetExpressionEngine();

var source = engine.CreateScriptSourceFromString(expression, SourceCodeKind.Expression);

var scope = engine.CreateScope(inputs);

return source.Execute(scope);

}

public T EvaluateExpression<T>(string expression, IDictionary<string, object> inputs)

{

return EvaluateExpression(expression, inputs);

}

private void SanitizeScope(IDictionary<string, object> scope)

{

scope.Remove("__builtins__");

}

}

}